Engineering economy

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a. What is the CW, when i=8% per year, of $1,600 per year, starting in year one and continuing forever; and $10,900 in year seven, repeating every six years thereafter and continuing forever? b. When i=8% per year in this type of problem, what value of N. practically speaking, defines "forever? Click the icon to view the interest and annuity table for discrete compounding when the MARR is 8% per year. (Round to the nearest a. The CW is $ dollar)